课程: Introduction to MongoDB

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Embedding data in documents

Embedding data in documents - MongoDB教程

课程: Introduction to MongoDB

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Embedding data in documents

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- Welcome. In this video, you'll learn about how to model your data by using embedding. Embedding is often used when you have one-to-many or many-to-many relationships in the data that's being stored. MongoDB recommends embedding documents in order to simplify queries and improve overall query performance. Let's begin with an overview of embedded documents, also known as nested documents. These are documents that contain a document inside of another document. Embedded documents can range from fairly straightforward, such as firstName, lastName embedded in a name field, to complex with many embedded fields. Embedded documents can be used for any type of a relationship model. To illustrate this, consider this document with embedded sub documents for name and address. In the name field, the customer has only one name, Sarah Davis. This is embedded as firstName, lastName. In the address field, the customer has three…

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